<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <input type="text" id="app">
    <script>
        var arr = [{
                name: "李四",
                id: "1001"
            },
            {
                name: "李二",
                id: "1002"
            },
            {
                name: "李三",
                id: "1003"
            },
            {
                name: "李五",
                id: "1004"
            }
        ]
        var app = document.getElementById('app');
        app.onkeydown = function (event) {
            if (event.keyCode == 13) {

                var key = Number(this.value);
                var res = arr.findIndex(item => {
                    return key == item.id;
                })

               if(res!=-1){
                arr.splice(res,1);
               }
               console.log(arr)
            }
        }
    </script>
</body>

</html>